专利名称：Signal processing system for transmission of
data between a keyboard and a signalprocessing unit
发明人：Sadakazu Shiga申请号：US08/838107申请日：19970415公开号：US05907718A公开日：19990525
摘要：A signal processing system which can perform cable transmission or opticaltransmission of data at the time of data transmission between a keyboard (1) and a signalprocessing unit to thereby has flexibility of data transmission. This signal processingsystem is composed of the keyboard (1), the signal processing unit and a receivingadapter unit. Further, the keyboard (1) consists of: a key matrix (6); a control portion (6)for outputting switch data corresponding to an operated key; a data transmitting portion(9) for outputting switch data through a cable (4); an optical data transmitting portion(10) for performing optical transmission of switch data; and a power supply (11). Thereceiving adapter unit is provided with: a data receiving portion for receiving switch datatransmitted through the cable (4); an optical data receiving portion for receiving opticaldata transmitted by performing optical transmission; a storage portion for storing switchdata received by a data receiving portion or an optical data receiving portion; and atransmission/reception control portion for converting switch data read from the storageportion into a switch code, for transmitting the switch code to the signal processing unitand for processing a signal supplied from the signal processing unit.
申请人：ALPS ELECTRIC CO., LTD.
代理机构：Brinks Hofer Gilson & Lione
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